On 2/6/06, Edward M. Martin <[EMAIL PROTECTED]> wrote: > Is this true even on a large cache DASD subsystem? And if it is, > Is this because page data sets are not cached? And finally,
You're right that with faster DASD it is not obvious that MDC still has value. The side effect we were discussing here is one reason, but there are other reasons. > Why are PDS's not cached? VM paging is not eligable for MDC, that's just for virtual machine I/O. But the paging routines use other techniques to exploit the hierarchy in storage and drive I/O efficiently. Rob -- Rob van der Heij rvdheij @ gmail.com Velocity Software, Inc
